Chock for log bunks



. Mar. 27, 1923. I

. v F. W. CHRISWELL ET AL CHOCK FOR LOG BUNKS FJJed Sept 5 1922 4gvweml'oc l Fred eri ck W Chriswen Elmer T F ehnel vFi -3 I aflio'cwzqPatented Mar. 27, 1923a.

UNITED STATES PATENT OFFICE.

FREDERICK W. CHRISWELL AND ELlVIER T. FEHNEL, OF SEATTLE, WASHINGTON,

ASSIGNORS TO PACIFIC CAR AND FOUNDRY COMPANY, OF SEATTLE, WASHING- TON,A CORPORATION OF WASHINGTON.

CHOCK FOR toe BUNKS.

Application filed September T all whom it may concern:

Be it known that we, F REDERICK W. CHRIswnLL and ELMER T. FEI-INEL,citizens of the United States of America, and residents of the city ofSeattle, in the county of King and State of Washington, have inventedcertain new and useful Improvements in Chocks for Log Bunks, of whichthe following is a specification.

Our invention relates to logging chocks and the manner of securing andholding them.

The object of our invention is to improve the construction and themanner of attaching the holding member to chocks of the type originallydisclosed in the patent to Knight,

The object of these improvements is to make the chock and the attachmentthereto stronger and at the same time simplify the manufacture and thecost of, the same, and also to so secure and hold the chock in the bunkthat while permitting free movement of the chock lengthwise of the bunkwithin the 26 desired limits, will prevent such movement of the chockrelative to the bunk as-will cause displacement from the ordinarypositions of use.

The features of our invention which are believed to be novel and uponwhich we desire to secure a patent will be hereinafter particularlydefined by the claims.

The accompanying drawings show our invention in the type of constructionwhich is now preferred by us.

Figure 1 is a top plan View and Figure 2 a side elevation with one endin section, of a logging bunk showing our chock combined therewith.

Figure 3 is a top or plan view of the chock and the manner of attachingthe holding member thereto.

Figure 4 is a side elevation of a chock with the holding arm insections.

In chocks of the type referred to it has been common to make these of aplate of metal bent into the angular form of the chock, and to securethe holding or retaining member, namely a chain or rod, thereto throughthe medium of a bolt or arm which is secured to the chock. This methodof holding is apt to be weak and at the same time permits the chock whennot in use be- 5, 1922. Serial No. 586,205.

ing twisted around and getting out of place so that it makes troublewhen the chock is to be put in position forloading logs. One of theprincipal objects of our invention is to provide a construction whichwill prevent such displacement of the chock.

Figures 1 and 2 show in plan and side elevation, respectively, a bunkhaving our chock applied thereto. As contemplated by us, this chock isto be made of cast steel. It has the two plates 1 and. 10 joined alongtheir upper edges so as to form an'inverted V- shaped casting. Tostrengthen this we provide flanges 11 at each side of the chock and ifthis be necessary, additional flanges as, for instance, one in thecenter, as is indicated by dotted lines in Figure 3. This flangematerially strengthens the chock.

The manner of securing the holding member to the chock consists informing an arm 2 integral with the lower edge of the inner side of thechock. This is preferably made with a central cavity 20 formed bycoring. This cavity is connected with the sides of the arm by openingsthrough which the ends of the link 3 by which it is connected with thechain 30, are passed. The link 3 is of triangular shape having the endsof the bar from which it is formed separated sufficiently to be passedover the arm 2. When the chain 30 is to be secured to the chock the link3 is heated and its ends pounded or otherwise forced together until theymeet in the cavity of the arm 2. The tips of the bar are preferablyheatedquite hot and when they meet within the cavity of the arm they areforced or hammered together so as to either secure a butt weld or toupset the ends thereof, as has been illustrated at 31 in Figure 3. Thetransverse bore in the arm 2 is intended to be made of such size as tobe a reasonably snug fit for the ends of the link 3. hen these ends ofthe link are pounded together while they are also hot, at or near thewelding heat, they will be upset and thereby enlarged sufliciently toresist any tendency to pull out of the arm.

The upper web or surface of the bunk to which the chock is applied isprovided with a slot extending lengthwise of the bunk and of a width toreceive the arm 2. The width of this slot is indicated in Figure 3 bythe dot and dash lines 4 The link 3 projects beyond the edges of thisslot and thus prevents thepossibility of the bunk being raised andturned crosswise. I e v The type of construction of the arm, togetherwith the manner of securing the link 3 thereto, makes a much strongerconnection than that which has been commonly employed heretofore. Italso is of such nature as to prevent the chock being shifted or jarredby the shaking of the car in transit, as has occasionally happened inconnection with such chocks otherwise constructed.

What we claim as ourinvention is:

1. A chock for logbunks comprising a body having two angularlypositioned plates anda holding arm integrally connected with the freeend of'one of said plates andadapted to extendthrough the top wall of abunk, said armhaving a transverse bore for the reception ofaholdingjmember.

'2. A chock for log bunks having two plates secured integrally togetherby their ends in substantially right angular relation,

,7 a holding arm extending from the free end of on of said plates andhaving a transverse bore provided between its ends with a lateralenlargement, and a holdinglink having its ends entering said hole andslightly displaced laterally to enter the lateral enlargement of thehole in the arm. 7 i

3. The combination with alog bunk having a longitudinally extending slotin its upper side near its ends, and chocks therefor each havingsubstantially right angularly positioned plates adapted to rest upon thetop surface of the bunk, the innermost one of said plates having anintegral holding arm extending downward through the. slot in the bunktop, saidarm having a transverse hole positioned below thelevel of thetop wall of the bunk, and a link forming a part of the chock holdingmeans and entering said transverse holel v,

Signed at Benton, King County, Washington, this 21st day of August,1922.

FREDERICK w, GHRISWELL. ELMER V T. FEHNEL.

